Shock-absorber



w. SWINDOWSKY.

SHOCK ABSORBER.

7 APPLICATION FILED DEC. 2- I918. 1 370, 54, Patented 1hr.- 8, 1921.

.qmmull d 7 lllllll 1| V. "w L 4 4 I wvawrzm' WALTER SWINDOWSKY, OF SAN ANTONIO, TEXAS.

SHOCK-ABSORBER.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed December 2, 1918. Serial No. 265,067.

To all whom it may concern Be it known that I, \VAL'rEn SwINDowsKY, a citizen of the United States, residing at San Antonio, in the county of Bexar and State of Texas, have invented a new and useful Shock-Absorber, of which the following is a specification.

This invention relates to an improvement in shock-absorbers the object of which is to provide suitable means to check the shock and rebound of vehicles in motion, said means consisting of springs exercising a constant tension on the body to be spring supported, thereby preventing undue jolting and insuring a smooth riding vehicle.

To obtain this, there is provided a number of springs, inclosed in casings and connected by rods in such manner that the springs expand when they absorb the shocks transmitted to the chassis.

The object is attained as illustrated in the accompanying drawing, in which Figure l is a vertical cross section of one form of my device adapted to use where the springs of the vehicle are positioned at right angles to the axle.

Fig. 2 is a vertical cross section of the device as adapted to a transverse spring construction as used in the Ford car.

Fig. 3 is a side elevation of the device shown in Fig. 2.

Fig. 4: is a vertical cross section of another form of the device.

Fig. 5 is a top plan view of the arm 20 shown broken away in Fig. 3.

The features of novelty and construction will be more fully described in connection with the accompanying drawing.

A casing 1 is mounted in any desired manner upon the vehicle axle 2, for instance, as indicated by clamps 3 and bolts 4. WVithin the casing 1 is inclosed the coil spring 5, and to the top and bottom ends of the spring 5, are secured caps 6 and 6, of such size that they extend beyond the outside edge of the casing.

A plunger rod 7, passes through a central opening 8, in the cap 6. At the end of rod 7 is secured a nut 9, and where the rod passes through the cap 6 at the under surface of same is a nut 10 secured to the rod 7.

At 11 the rod 7 is shackled to a beam 12, which is secured to the frame 13 of the chassis. The main spring 14 is fastened to the axle 2 in any approved manner.

The device operates as follows: In checking the downward motion of the chassis, the beam 12 shackled to the rod 7 presses the nut 9 against the inner surface of cap 6*, thereby expanding spring 5 in a downward direction until the shock is absorbed, because the spring 5 is secured to the cap 6 which in turn strikes the top edge 1*, of easing 1 preventing the spring from being drawn down through the casing.

In taking up, the rebound of the chassis the rod 7 is drawn upward by the beam 12 and as the nut 10 bears against the inner surface of the cap 6 which is secured to the spring 5 the latter must expand until the rebound is checked, because the spring is secured to the cap 6 which in turn strikes the casing 1 at 1", causing the spring to expand in an upward direction.

In the modified form of the device shown in Figs. 2 and 3 the axle 14: carries the transverse spring 15 to which is bolted the rod 16, the top end of same is secured to the yoke 17 which in turn is connected with the rods 7.

Numbers 1, 1, 1 5, 6, 7, 8, 9, 10, are the same as described in Fig. 1. To the casing 1 is fastened the band 18 which is joined at 19 with the arm 20, which in turn is connected to an element of the vehicle.

Fig. 5 is a top view of the arm 20, as can be seen the arm ends in a fork 21, each end 'of this fork connects with the band 18 by a joint 19, this arrangement keeps the spring 5 in alinement with the leaf spring 15, preventing all buckling strain. Otherwise the device is essentially of the same construction as the parts designated by similar reference characters in Fig. 1.

In the modified construction of the device shown in Fig. 4, the parts numbered 1, 5, 6, 7, 8, 9, 10, 14s, 15 are the same as described in Figs. 1 and 2. The casing 1 is rigidly secured to the axle 14* by the member 23, the leaf spring 15 is joined by a shackle 21 to the plunger rod 7. The guide bar 22 forms a rigid joint with the plunger rod 7 and a sliding connection with the member 23, this araar zigement prevents lateral strain to the r0 The length of rods 7 and 16 can be such that the chassis rests on the main springs until the shock and rebound brings the springs 5 into action.

The cap 6, and the top edge 1, may be sufficiently apart so that only an excessive shock gets springs 5 into action, this arrangement does not stiffen the main springs leaving them elastic to absorb the slighter shocks.

On vehicles with extra stiff main springs the rods 7 may be of such length that the springs 5 carry the chassis when not loaded, bringing the main springs into action when the vehicle carries a load. This arrangement gives flexibility to vehicles of heavy construction while driving without a load.

I claim:

1. In a device of the character described, a tubular casing having upper and lower open ends, a 'coil spring in said casing, each end of said coiled spring being secured to a cap, having a diameter greater than that of the casing, the top and bottom edges of easing providing abutments for said caps and serving to limit the movements of said coiled spring in opposite directions, a plunger rod movable with respect to the casing passing through one of said caps and through said coiled spring, a nut on the lower end of the plunger rod adapted to bear on the inner side of one of said caps, a second nut secured to an intermediate portion of the plunger rod and adapted to bear against the inner side of the other of said caps, means to attach the casing to one element of a vehicle, and means to attach the plunger rod to another element of a vehicle movable with respect to the first mentioned element.

2. A casing, a coil spring in said casing secured at each end to a cap having a diameter greater than that of the casing, a plunger rod passing through said casing, a nuton the lower end of said rod adapted to bear against the inner side of the cap at one end of the casing, a second nut on the intermediate portion of said plunger rod adapted to bear against the inner side of the cap at the top of said casing, means to connect the casing to one element of a vehicle and means to connect said plunger rod to another element of the vehicle movable with respect to said first mentioned element.

In testimony whereof I aflix my signature in .presence of two witnesses.

WALTER SWINDOWSKY.

Witnesses OTTO S. LAMMERS,. G. Bum. 

